bk commit into 4.1 tree (holyfoot:1.2530) BUG#12620

[holyfoot]

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ChangeSet@stripped, 2006-08-07 20:12:15+05:00, holyfoot@stripped +2 -0
  bug #12620 (UTF-8 indexing on a remote volume causes ER_NO_KEYFILE error)
  
  The problem is that 'read' and 'write' functions on MacOSX can
  return -1 instead of expected 0 being called with 0 bytes to
  read/write.
  So i added code to not to call these at all in this case.

  mysys/my_read.c@stripped, 2006-08-07 20:12:12+05:00, holyfoot@stripped +9 -0
    fix for MacOCX

  mysys/my_write.c@stripped, 2006-08-07 20:12:12+05:00, holyfoot@stripped +9 -0
    fix for MacOSX

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	holyfoot
# Host:	deer.(none)
# Root:	/home/hf/work/mysql-4.1.12620

--- 1.7/mysys/my_read.c	2006-08-07 20:12:19 +05:00
+++ 1.8/mysys/my_read.c	2006-08-07 20:12:19 +05:00
@@ -45,6 +45,15 @@
   for (;;)
   {
     errno=0;					/* Linux doesn't reset this */
+#ifdef __APPLE__
+    /* MacOSX can return -1 from the read function if the Count is 0 */
+    /* so we have to handle it separately here                       */
+    if (!Count)
+    {
+      readbytes= 0;
+      break;
+    }
+#endif
     if ((readbytes = (uint) read(Filedes, Buffer, Count)) != Count)
     {
       my_errno=errno ? errno : -1;

--- 1.11/mysys/my_write.c	2006-08-07 20:12:19 +05:00
+++ 1.12/mysys/my_write.c	2006-08-07 20:12:19 +05:00
@@ -32,6 +32,15 @@
 
   for (;;)
   {
+#ifdef __APPLE__
+    /* MacOSX can return -1 from the write function if the Count is 0 */
+    /* so we have to handle it separately here                        */
+    if (!Count)
+    {
+      writenbytes= 0;
+      break;
+    }
+#endif
     if ((writenbytes = (uint) write(Filedes, Buffer, Count)) == Count)
       break;
     if ((int) writenbytes != -1)